In a group of 20 students, there are 7 boys.
What is the ratio of girls to boys?

it's 13:7

since there are 7 boys and they're 20 all in all so 13 are girls

the ratio of girls to boys=girls/boys=(20-7)/7=13/7 ratio is 13:7

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step-by-step explanatio89

step-by-step explanation:

we can use this expression to calculate the energy gain as a particle moves with a field or the energy loss as it moves against it. (note that it is also used to define the electron-volt, a unit of energy equal to that gained by an electron as it falls through a pd of 1 v, i.e. w = 1 ev = 1.6 10-19 c 1 v = 1.6 10-19j).in fact this expression is really nothing more than the statement that potential is the potential energy per unit charge. in this case, v= w/qis simply stating that the change in potential energy(or work done) per unit charge is equal to the change in potential (or potential difference), v.student questions: uniform electric fields2electron beamcathode+5 kvanode0 v